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{- git-annex command line parsing and dispatch
-
- Copyright 2010-2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module CmdLine (
dispatch,
usage,
shutdown
) where
import qualified Control.Exception as E
import qualified Data.Map as M
import Control.Exception (throw)
import System.Console.GetOpt
#ifndef mingw32_HOST_OS
import System.Posix.Signals
#endif
import Common.Annex
import qualified Annex
import qualified Git
import qualified Git.AutoCorrect
import qualified Git.Config
import Annex.Content
import Annex.Environment
import Command
import Types.Messages
{- Runs the passed command line. -}
dispatch :: Bool -> CmdParams -> [Command] -> [Option] -> [(String, String)] -> String -> IO Git.Repo -> IO ()
dispatch fuzzyok allargs allcmds commonoptions fields header getgitrepo = do
setupConsole
case getOptCmd args cmd commonoptions of
Right (flags, params) -> go flags params
=<< (E.try getgitrepo :: IO (Either E.SomeException Git.Repo))
Left parseerr -> error parseerr
where
go flags params (Right g) = do
state <- Annex.new g
Annex.eval state $ do
checkEnvironment
when fuzzy $
inRepo $ autocorrect . Just
forM_ fields $ uncurry Annex.setField
when (cmdnomessages cmd) $
Annex.setOutput QuietOutput
sequence_ flags
whenM (annexDebug <$> Annex.getGitConfig) $
liftIO enableDebugOutput
startup
performCommandAction cmd params
shutdown $ cmdnocommit cmd
go _flags params (Left e) = do
when fuzzy $
autocorrect =<< Git.Config.global
maybe (throw e) (\a -> a params) (cmdnorepo cmd)
err msg = msg ++ "\n\n" ++ usage header allcmds
cmd = Prelude.head cmds
(fuzzy, cmds, name, args) = findCmd fuzzyok allargs allcmds err
autocorrect = Git.AutoCorrect.prepare name cmdname cmds
{- Parses command line params far enough to find the Command to run, and
- returns the remaining params.
- Does fuzzy matching if necessary, which may result in multiple Commands. -}
findCmd :: Bool -> CmdParams -> [Command] -> (String -> String) -> (Bool, [Command], String, CmdParams)
findCmd fuzzyok argv cmds err
| isNothing name = error $ err "missing command"
| not (null exactcmds) = (False, exactcmds, fromJust name, args)
| fuzzyok && not (null inexactcmds) = (True, inexactcmds, fromJust name, args)
| otherwise = error $ err $ "unknown command " ++ fromJust name
where
(name, args) = findname argv []
findname [] c = (Nothing, reverse c)
findname (a:as) c
| "-" `isPrefixOf` a = findname as (a:c)
| otherwise = (Just a, reverse c ++ as)
exactcmds = filter (\c -> name == Just (cmdname c)) cmds
inexactcmds = case name of
Nothing -> []
Just n -> Git.AutoCorrect.fuzzymatches n cmdname cmds
{- Parses command line options, and returns actions to run to configure flags
- and the remaining parameters for the command. -}
getOptCmd :: CmdParams -> Command -> [Option] -> Either String ([Annex ()], CmdParams)
getOptCmd argv cmd commonoptions = check $
getOpt Permute (commonoptions ++ cmdoptions cmd) argv
where
check (flags, rest, []) = Right (flags, rest)
check (_, _, errs) = Left $ unlines
[ concat errs
, commandUsage cmd
]
{- Actions to perform each time ran. -}
startup :: Annex ()
startup =
#ifndef mingw32_HOST_OS
liftIO $ void $ installHandler sigINT Default Nothing
#else
return ()
#endif
{- Cleanup actions. -}
shutdown :: Bool -> Annex ()
shutdown nocommit = do
saveState nocommit
sequence_ =<< M.elems <$> Annex.getState Annex.cleanup
liftIO reapZombies -- zombies from long-running git processes
|
